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; RUN: opt -S -passes=objc-arc-contract < %s | FileCheck %s
; CHECK-LABEL: define void @foo() {
; CHECK: %call = tail call ptr @qux()
; CHECK-NEXT: call void asm sideeffect "mov\09r7, r7\09\09@ marker for return value optimization", ""()
; CHECK-NEXT: %0 = tail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %call) [[NUW:#[0-9]+]]
; CHECK: }
define void @foo() {
entry:
%call = tail call ptr @qux()
%0 = tail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %call) nounwind
tail call void @bar(ptr %0)
ret void
}
; CHECK-LABEL: define void @foo2() {
; CHECK: %call = tail call ptr @qux()
; CHECK-NEXT: call void asm sideeffect "mov\09r7, r7\09\09@ marker for return value optimization", ""()
; CHECK-NEXT: %0 = tail call ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %call) [[NUW:#[0-9]+]]
; CHECK: }
define void @foo2() {
entry:
%call = tail call ptr @qux()
%0 = tail call ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr %call) nounwind
tail call void @bar(ptr %0)
ret void
}
; CHECK-LABEL: define ptr @foo3(
; CHECK: call ptr @returnsArg(
; CHECK-NEXT: call void asm sideeffect
define ptr @foo3(ptr %a) {
%call = call ptr @returnsArg(ptr %a)
call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %call)
ret ptr %call
}
; CHECK-LABEL: define ptr @foo4(
; CHECK: call ptr @returnsArg(
; CHECK-NEXT: call void asm sideeffect
define ptr @foo4(ptr %a) {
%call = call ptr @returnsArg(ptr %a)
call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr %a)
ret ptr %call
}
declare ptr @qux()
declare ptr @llvm.objc.retainAutoreleasedReturnValue(ptr)
declare ptr @llvm.objc.unsafeClaimAutoreleasedReturnValue(ptr)
declare void @bar(ptr)
declare ptr @returnsArg(ptr returned)
!llvm.module.flags = !{!0}
!0 = !{i32 1, !"clang.arc.retainAutoreleasedReturnValueMarker", !"mov\09r7, r7\09\09@ marker for return value optimization"}
; CHECK: attributes [[NUW]] = { nounwind }
|
